1.3

Question 1

what is the peripheral nervous system?

Answer 1

all nerves lie outside the brain and spinal cord

Question 2

what are nerves?

Answer 2

bundle of neuron fibers that are routed together in the PNS

Question 3

what is the somatic nervous system?

Answer 3

nerves that connect to voluntary skeletal muscles and to sensory receptors

Question 4

what are afferent nerve fibers?

Answer 4

axons that carry information inwards to the central nervous system from the periphery

Question 5

what are efferent nerve fibers?

Answer 5

axons that carry information outwards from the central nervous system to the periphery

Question 6

what is the autonomous nervous system?

Answer 6

nerves that connect to the heart, blood vessels, smooth muscles and glands

Question 7

what is sympathetic division?

Answer 7

branch of the ANS that mobilizes the body’s resources for emergencies (fight or flight response)

Question 8

what is parasympathetic division?

Answer 8

branch of the ANS that generally conserves bodily resources

Question 9

the central nervous system consists of?

Answer 9

spinal cord and brain

Question 10

what is the spinal cord?

Answer 10

spinal cord connects the brain to the rest of the body through the PNS

Question 11

what is the brain?

Answer 11

fills the upper portion of the skull and contains billions of interacting cells that integrate information from inside and outside of the body.